The number of students who take both the subjects mathematics and chemistry is 30. This represents 10% of the enrolment in mathematics and 12% of the enrolment in chemistry. How many students take at least one of these two subjects?
Show Hint
To find the number of students taking at least one subject, use the formula:
\[
|A \cup B| = |A| + |B| - |A \cap B|
\]
where \( A \) and \( B \) are the two subjects.